MCQ Rashtrakuta Dynasty SET 6

ALL MCQ For Rashtrakuta Dynasty

1. Of the two lubricants A and B for a machine, A has co-efficient of viscocity slightly greater than that of B. Which would you prefer in summer and winter?

B in summer and A in winter

B in summer as well as winter

A in summer and B in winter

A in summer as well as winter

Your comments:

Question 1 of 20

2. A venturimeter is used to

measure speed of a freely falling body in the fluid

measure atmospheric pressure

measure flow speed of incompressible fluid

find viscosity of a fluid

Your comments:

Question 2 of 20

3. Velocity of efflux flowing through an orifice at height h below the free surface of liquid is given by

Your comments:

Question 3 of 20

4. The minimum pressure require to force the blood of density 1.04 g cm^-3 from the heart to the top of the head (vertical distance = 60 cm) is:

3.5 x 10⁴ dyne cm^-2

5.1 x 10⁴ dyne cm^-2

6 x 10⁵ dyne cm^-2

6.1 x 10⁴ dyne cm^-2

Your comments:

Question 4 of 20

5. The pressure of water at the bottom of a water tank exceeds the atmospheric pressure by 10⁴ Pascal. The velocity of efflux of water through an orifice at the bottom of the water tank will be (g = 10 ms^-2).

Your comments:

Question 5 of 20

6. Viscosity is the property of fluids by virtue of which they tend to:

create a relative motion between their layers

maintain the relative motion between their layers

destroy any relative motion between their layers

none of the above

Your comments:

Question 6 of 20

7. Find the Reynold's number for the liquid flowing in a pipe of diameter 1.2 cm with average velocity 15 cm/s. Take η = 0.01 poise and ρ = 0.9 gm/cc

16.20

1620

162.0

1.620

Your comments:

Question 7 of 20

8. A tank containing water has an orifice on one vertical wall. If the centre of the orifice is 5 m below the surface of water in the tank, the velocity of discharge is (take g = 9.8 m/s²)

9.5 m/s

10 m/s

9 m/s

9.9 m/s

Your comments:

Question 8 of 20

9. During flight, the weight of the plane is balanced by

Gravitational force

Magnus effect

High speed of plane

Dynamic lift provided by wings

Your comments:

Question 9 of 20

10. Venturimeter is a device used to measure the

Rate of flow of an incompressible liquid

Rate of expansion of a real gas

Rate of flow of a compressible liquid

Rate of expansion of an ideal gas

Your comments:

Question 10 of 20

11. Two light balls are suspended with light strings very close to each other. What happens when we blow air between the balls:

They come together

They go apart

Both of them will move in the same direction in right angle to the speed of air

They will be unaffected

Your comments:

Question 11 of 20

12. Venturimeter is a device based on

Hooke's law

Pascal's law

Stokes law

Bernoulli's theorem

Your comments:

Question 12 of 20

13. A flat plate is separated from a large plate by a layer of glycerine of thickness 3 X 10^-3m. If the co-efficient of viscocity of glycerine is 2 Nsm², what is the force required to keep the plate moving with a velocity of 6 X 10^-2m/s. Area of the plate is 4.8 X 10^-3m².

1.92 N

0.192 N

192 N

19.2 N

Your comments:

Question 13 of 20

14. Which of the energy is not related to streamline flow of liquid?

Kinetic Energy

Surface Energy

Potential Energy

Pressure Energy

Your comments:

Question 14 of 20

15. The rate of flow of liquid through an orifice at the bottom of a tank does not depend on

the height of the liquid above orifice

density of the liquid

the area of cross-section

the acceleration due to gravity

Your comments:

Question 15 of 20

16. Which of the following assumptions is not considered while arriving at Stoke's law.

The viscosity of the medium is homogeneous and of infinite extent

There is no slip between the fluid layers

Spherical body is perfectly rigid and smooth

The velocity of the body is small, so that motion of fluid relative to body is streamlined

Your comments:

Question 16 of 20

17. Pressure inside the constricted artery is

Almost equal to external pressure

Greater than the external pressure

lower than external pressure

May be equal or greater than external pressure

Your comments:

Question 17 of 20

18. A person standing near the track of a fast moving train has a tendency to fall towards it because of:

some other effect.

Vibration due to motion of train

Gravitational force of attraction between person and train

the high speed of train

Your comments:

Question 18 of 20

19. The dynamic lift due to spinning is called:

Hooke's law

Magnus Effect

Aerofoil

Bernoulli's theorem

Your comments:

Question 19 of 20

20. The speed of efflux from an open tank is given by a formula identical to that of a:

projectile

freely falling body

liquid flowing in a horizontal pipe

recoiling gun

Your comments:

Question 20 of 20

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